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4479981 = 311135757
BaseRepresentation
bin10001000101101111101101
322102121101020
4101011233231
52121324411
6240004353
753036112
oct21055755
98377336
104479981
11258a970
1216006b9
13c0b19c
14848909
155d7606
hex445bed

4479981 has 8 divisors (see below), whose sum is σ = 6516384. Its totient is φ = 2715120.

The previous prime is 4479973. The next prime is 4479989. The reversal of 4479981 is 1899744.

It is an interprime number because it is at equal distance from previous prime (4479973) and next prime (4479989).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4479981 - 23 = 4479973 is a prime.

It is a super-2 number, since 2×44799812 = 40140459520722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4479989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67846 + ... + 67911.

It is an arithmetic number, because the mean of its divisors is an integer number (814548).

Almost surely, 24479981 is an apocalyptic number.

It is an amenable number.

4479981 is a deficient number, since it is larger than the sum of its proper divisors (2036403).

4479981 is a wasteful number, since it uses less digits than its factorization.

4479981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135771.

The product of its digits is 72576, while the sum is 42.

The square root of 4479981 is about 2116.5965605188. The cubic root of 4479981 is about 164.8511789431.

It can be divided in two parts, 4479 and 981, that added together give a triangular number (5460 = T104).

The spelling of 4479981 in words is "four million, four hundred seventy-nine thousand, nine hundred eighty-one".

Divisors: 1 3 11 33 135757 407271 1493327 4479981